My new iPad version is Pro 10.5", and the Stack Exchange iOS app is unable to properly detect that device. See below:
Neither the Stack Exchange app or SE server knows the name of your device. They can only get the model number, which is
iPad7,3. All apps that do "device identification" have their own databases of display names mapper. So the bug is simply because that:
Your device is too new. SE doesn't have a record of that by far. It'll be fixed as soon as SE adds a mapper entry to map
iPad7,3 to "iPad Pro 10.5-inch (Wi-Fi)".
Apps only get model numbers and manufacturers. They must build a database of display names by themselves.